mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* @author Federico Bond <federicobond@gmail.com>
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* @date 2016
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* Static analyzer and checker.
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*/
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#pragma once
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#include <libsolidity/analysis/TypeChecker.h>
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#include <libsolidity/ast/Types.h>
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#include <libsolidity/ast/ASTAnnotations.h>
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#include <libsolidity/ast/ASTForward.h>
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#include <libsolidity/ast/ASTVisitor.h>
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namespace solidity::langutil
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{
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class ErrorReporter;
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}
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namespace solidity::frontend
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{
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class ConstructorUsesAssembly;
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/**
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* The module that performs static analysis on the AST.
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* In this context, static analysis is anything that can produce warnings which can help
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* programmers write cleaner code. For every warning generated here, it has to be possible to write
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* equivalent code that does not generate the warning.
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*/
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class StaticAnalyzer: private ASTConstVisitor
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{
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public:
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/// @param _errorReporter provides the error logging functionality.
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explicit StaticAnalyzer(langutil::ErrorReporter& _errorReporter);
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~StaticAnalyzer() override;
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/// Performs static analysis on the given source unit and all of its sub-nodes.
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/// @returns true iff all checks passed. Note even if all checks passed, errors() can still contain warnings
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bool analyze(SourceUnit const& _sourceUnit);
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private:
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bool visit(ContractDefinition const& _contract) override;
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void endVisit(ContractDefinition const& _contract) override;
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bool visit(FunctionDefinition const& _function) override;
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void endVisit(FunctionDefinition const& _function) override;
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bool visit(ExpressionStatement const& _statement) override;
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bool visit(VariableDeclaration const& _variable) override;
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bool visit(Identifier const& _identifier) override;
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bool visit(Return const& _return) override;
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bool visit(MemberAccess const& _memberAccess) override;
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bool visit(InlineAssembly const& _inlineAssembly) override;
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bool visit(BinaryOperation const& _operation) override;
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bool visit(FunctionCall const& _functionCall) override;
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langutil::ErrorReporter& m_errorReporter;
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/// Flag that indicates whether the current contract definition is a library.
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bool m_library = false;
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/// Number of uses of each (named) local variable in a function, counter is initialized with zero.
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/// Pairs of AST ids and pointers are used as keys to ensure a deterministic order
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/// when traversing.
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std::map<std::pair<size_t, VariableDeclaration const*>, int> m_localVarUseCount;
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/// Cache that holds information about whether a contract's constructor
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/// uses inline assembly.
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std::unique_ptr<ConstructorUsesAssembly> m_constructorUsesAssembly;
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FunctionDefinition const* m_currentFunction = nullptr;
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/// Flag that indicates a constructor.
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bool m_constructor = false;
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/// Current contract.
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ContractDefinition const* m_currentContract = nullptr;
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};
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}
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